Gas-oven.



G. A.i YOUNG & R'. B. REED.

GAS OVEN.

APPLICATION FILED JUNE l 2\ |916.

Patented Dec. 10, 1918.

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GAS ovEN.

APPLICATION FILED JUNE l2. 19l6. 1 ,27,561 Patented Deo. 10, 1918.

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GAS OVEN.

APPLICATION FILED IUIIE I2. 1916.

Patented Dee. 10,A

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GEoRGE A. YOUNG AND ROBERT B. REED, OE DETROIT, MICHIGAN, AssIGNORs To YOUNG BROTHERS COMPANY, OE DETROIT, MICHIGAN, A CORPORATION OE MICHIGAN.

GAS-OVEN.

To all 'whom t may concern:

Be it known that we, GEORGE A. YOUNG and ROBERT B. REED, citizens of the United- States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvernents in' Gas-Ovens, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to ovens for japanning, enameling and heat treating purposes, and the primary object of our invention is to utilize heated air for heating the vide a heating apparatus for air and furnish the same with baliles, dampers and a "system of ventilation which insures a high degree of efficiency in maintaining a uni` form heat in the oven.

'A further object of our' invention is to provide an air heating apparatus of the return flue type having the flues thereof compactly arranged and disposed to be readily removed and cleaned, and this is accomplished without disturbing other parts of the apparatus or oven.

A still further object of our invention is to provide an air heating apparatus wherein the parts are constructed with a view of reducing the cost of manufacture and at the same time `retain the features by which durability, simplicity of construction, and means of assembling are secured.l With such ends in view, .our invention resides in lthe novel construction, combination and arrangement of parts to be hereinafter specifically described and then claimed.

Reference will now be had to the `drawings, wherein- Figure 1 is a longitudinalsectional view of the oven partly broken away and showing an air heating apparatus partly broken away and partly in section;

Fig. 2 is a cross sectional view of the oven, taken on the line II--II of Fig. 1, showing the heating apparatus in front elevation and partly broken away and partly in section;

Fig. 3 is a horizontal sectional view of a portion of the oven showing a heating apparatus in plan;

Specication of Letters Patent. Patented Dec. 10,1918. Application mea June 12, 1916. sena; No. 103,211.

fFig. 4 is an enlarged cross sectional view g takenon the line IV-IV of Fig. 3;

Fig. 5 is an enlarged horizontal sectional view taken on the line V-V of Fig. l;

F ig. 6 is a similar view taken on VI-VI of Fig. 1, and v Fig. 7 is a similar view taken on the line VII-VII Of Fig. 1.

In describing our invention'by aid of the views above referred to, we desire it to be understood that the same are merelyillustrative of an oven as now in use, and we do not care to confine our invention to the precise construction and arrangement ,ofY parts shown. The following description is therefore to be broadly construed as including the line substitute constructions and arrangement of parts which are the obvious equivalents Of,-

thoseto be hereinafter referred to. v

In the drawings, 1 denotes -a box-like or rectangular structure constituting an ovenor inclosure, and this oven has double walls or inner and outer shells with a suitable insulation material therebetween. The Side walls of the oven are designated 2 and the front wall 3 of the Oven has a doorway 4 adapted to be closed by a door 5, said door being constructed similar to the wallsof the oven.

In the oven, at each side wall 2 thereof, is an air heating apparatus, and the space between these apparatus provides suiicient clearance for articles to be heat treated within the oven.v As the apparatus are identical in construction we deem it only necessary to describe in detail one of the apparatus, particularly that at the left hand side of Fig. 2 which has been illustrated in the remaining ligures of the drawing.

On the bottom of the oven is the burner housing extending from the front wall 3 to a point in proximity to the rear wall 6 of the oven, said burner housing having the front end thereof open and the rear or inner endgthereof closed. The burner housing comprises side walls 7 and 8 connected by horizontal partitions 9 and 10, said partitions coperating with the sidewalls 7 and 8 in providing a secondary air intake ue 11 which is open to the atmosphere at the front wall 3 and has an 'extension 12 open at the rear wall 6. The partition 9 forming the top of the flue has longitudinally disposed openings 13, and straps 14 for an apertured damper 15 slidable below the partition 9 for vir a.

regulating the amount of air passing through the partition 9. At the forward end of the damper 15 there is an apertured side extension 16 disposed above an aper- \tured bracket 17 carried by the forward end The iront end of the burner housing has a hinged door 22 and this door has an opening 23 and an angularly disposed mirror or reHecting plate 24, whereby the burnerA Haines within, the housing may be readily observed from the exterior of the oven and properly regulated.

The burner housing provides a combustion chamber 25 below and above the baHe plate 20 and contiguous to the front wall 3 of the oven the burner housing has a vertical connection 26 to a Hue box 27, said Hue box be- .ing disposed at the inner side of the heating apparatus with one of its walls in verti' cal alinement with the wall 8l of the burner housing. The Hue box 27 is rectangular in cross section, and extends in proximity to the roof of the oven.

At the inner or rear end of the burner housing there is a similarly oHset intake Hue box 28 and disposed in parallelism .with these intake Hue boxes are exhaust Hue boxes 29 and 30. The exhaust Hue boxes 29 and 30 top of the burner housing, as shown in Fig.

.4 and the upper ends of said exhaust Hue boxes extend through the roof or top of the oven.

The intake Hue boxes 27 and 28 are pro vided with spaced nipples 31 disposed in lateral planes and at an obtuse angle to the walls of the boxes.A The exhaust Hue boxes 29 and 30 have similar nipples 32 with the nipples of the exhaust Hue box 30 in aline ment with the nipple of the intake Hue box 27, and the nipples of the intake Hue box 28 in alinement with the nipples of the exhaust Hue box 29. rlfhe'nipples of the intake Hue box27 are connected to the nipples of the exhaust Hue box 30 by Hues 33 and the nipples of the intake Hue box 28 are connected to the nipples of the exhaust Hue box 29 by Hues 34, said Hues being in superposed planes with the`Hues 33 at a reverse angle to the Hues34. In other words, the Hues 34 cross the Hues 33 and this arrangement permits of the Hues 33 and 34 being easily removed .without disturbing the Hue'boxes. The Hues 33 and 34 are fitted over the nipples of the exhaust Hue boxes 29 and 30 and the opposite ends of said Hues are connected to the nipples of the intake Hue boxes 27 and 28 by slide sleeves 35, which can be shifted on to the Hues when it is desired to disconnect the same. This arrangement of the Hues permits of easy access being had to the same with a very compact arrangement and when a Hue isl removed, the open nipples may be plugged and the apparatus used unv til another Hue is placed in position.

, In the intake Hue boxes 27 and 28 are de- Hector partitions 36 distributing heated air to groups of Hues leading from said boxes, andin the exhaust Hue boxes 29 and 30 there are similar deHector partitions 37, said partitions` extending into the upper ends of the exhaust Hue boxes to provide individual Hues for the exhaust of air from certain groups of Hues 33 and 34. In the upper ends of the exhaust .Hue boxes are dampers 38, one for each individual Hue therein, and it is through the medium of these dampers that the exhaust of heated air from the apparatus may be retarded and the apparatus regulated to maintain a uniform heat.

In closing the greater part of the exhaust Hue boxes 29 and 30 within the oven, are ventilating ducts 39 having the lower ends thereof extending out of the front and rear walls of the oven and provided with screens 40; The upper ends of the Ventilating ducts 39 open into the upper portion of the oven, as best shown in Fig. 6, and the air admitted to the oven for Ventilating purposes is heated by the .walls of the exhaust Hue boxes 29 and 30. The Ventilating ducts also serve as an insulationfor the exhaust Hue boxes, particularly since the Ventilating ducts are between the side walls 2 of the oven and the intake as well as the exhaust Hue boxes. Y

The burner housing has the roof or top 40a thereof, between the connections 26, inclined, as best shown in- Fig. 4, to support anineline deHector 41. rIhis deHector prevents accumulation of matter upon the top of the burner housing, which is necessarily very hot during the operation of the air heating apparatus.

In operation, the air for combustion purposes or the secondary air intake of the heatmg apparatus is regulated by the slide damper 15 and the heated air and products of combustion pass upwardly through the connections 26 of thel burner housing into the Hue boxes 27 and 28. The heated air entering these Hue boxes is deHected into groups of Hues 33 and 34 to pass'therethrough into the Hue boxes 29 and 30. The heated air in 4 these exhaust Hue boxes is utilized to heat a secondary air intake through the Ventilating duets 39, and as the walls of the various Hue boxes and Hues representa large area, the interior of the oven structure can be easily and `quickly heated to subject articles therein to a desired temperature for japanning, enameling or other heat treating purposes.

It is through the medium of the individual vdampers .38 that the' passage of air from lower, intermediate and upper groups of Hues 33 and 34 can be easily regulated and consequently thetemperature of theoven.

Considerable importance is attached to the disposal of the Hues 33 and 34, as the same can be easily and quickly removed when lit is desired to remove soot and thoroughly' cleanse the interior as well as the exterior of the Hues. `As each heating apparatus is in proximity to a side wall of the ovenA structure, it is` practically impossible to remove theHues 33 and 34 other than from the inner side of each apparatus. Asa matter of fact,

the. greater part of eachheating vapparatus can .be removed or disassembled to ybe cleaned,thus allowing the entire interior of Y the oven to be cleansed.

With someinstallations'for I ieat treating products, it is possible to dispense with the air intake Hue 11 as a secondary air supply in which instance the burners receive air for e combustion through the'exterior mixing de- Aao .vice,'or an'independent'heating agent is led into the Hue boxes. It is also possible to dispense with the Ventilating' ducts when suliicient oxygen is otherwise supplied, and in yextreme cases additional Ventilating ducts may be associated with the intake Hue boxes -as well-as the exhaust Huevboxes.

What we claim is v l. In an oven, an air heating apparatus at each side wall thereof, each apparatus comprising a burner housing having an airintake Hue open at the front and rear walls of said oven, a damper as afpart of said Hue to control the supply of air to said housing, a

burner in said housing, .intake Hue boxes at the ends of said' housing and in communicat1on therewith, exhaust Hueboxes at the vends of said housing' and in parallelism with said intake Hue boxes, Ventilating ducts around/ said exhaust Hue boxes in communication with said oven and open at the front and y boxesand removable from `rear walls thereof, and crossed detachable Hues above said burner housing connecting said intake Hue boxes to saidexhaust Hue one `side of,s'aid' apparatus only.A f t v Y 2.v In an oven, an vair heating apparatus at` each side wall thereof, each apparatus comprising intakelue boxes, exhaust flue boxes,- in parallelism therewithand open at the top -of said oven, Ventilating ducts around said exhaust boxes in communication with said .oven and open at the front and rear walls i thereof, crossed detachable Hues connecting 5 Land having the endsy t said intake Hue boxes to said exhaust Hue boxes and removable from one side of-sad apparatus only, and means communicating with said intake Hue boxes adapted to supply heated .air thereto.

3. kIn an oven, an air heating apparatus in` said oven, comprising intake Hue boxes, exhaust Hue boxes in arallelism therewith iiereof open at the top of said oven,'mea ns adapted for regulating the exhaust from the open ends of Asaid exhaust Hue boxes, Ventilating ducts around said exhaust Hue. boxes in communication with said oven and having the endsthereof open at the front and rear walls of said oven,

crossedv Hues connecting said intakel VHue boxes ,to said exhaust Hue boxes, and means below said Hues adapted for supplying heated air to said intake Huel boxes.

4. In an oven adapted to lbe heated by hot air, means `for circulating hot air at the walls of the ovencomp-rising, in combination with a suitablesourc'e of hot airL intake and exhaust Hue boxes, crossed detachable Hues connecting said intake Hue boxes to said Huel boxes for deHecting air into certain defined groups of Hues.

5. In an oven adapted to be heated by hot exhaust Hue boxes, and meanswithin 'said air, vthe combination with a suitable source ioo prising intake Hue boxes in said oven in communication with the source of hot air, exhaust Hue boxes in parallelism with said intake AHue boxes, crossed detachable' Hues connecting said intake Hue boxes to said ex? haust Hue boxes, dampers inbonnection with said i exhaust Hue boxes, Ventilating ducts adapted to be heated by said exhaust Hue boxes and establishing communication between said oven and the atmosphere, and means in said intake and exhaust Hue boxes adapted for deHecting air into certain defined groups yof Hues. f

In testimony whereof tures in presence of two witnesses.

' GEORGE A. YOUNG. l vROBERT B. REED.

Witnessesfi' j lKARL. H. BUTLER, `ANNA M. DoRR.

we aiiix our signa- 

